Revert of Add a FOUC painting test.

Source/web/tests/sim/SimCompositor.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SimCompositor_h
-#define SimCompositor_h
-
-namespace blink {
-
-class SimLayerTreeView;
-class WebViewImpl;
-
-// Simulated very basic compositor that's capable of running the BeginMainFrame
-// processing steps on WebView: beginFrame, layout, paint.
-//
-// The painting capabilities are very limited in that only the main layer of
-// every CompositedDeprecatedPaintLayerMapping will be painted, squashed layers
-// are not supported and the entirety of every layer is always repainted even if
-// only part of the layer was invalid.
-//
-// Note: This also does not support compositor driven animations.
-class SimCompositor final {
-public:
-    explicit SimCompositor(SimLayerTreeView&);
-    ~SimCompositor();
-
-    void setWebViewImpl(WebViewImpl&);
-
-    struct BeginFrameResult {
-        // If any text was drawn in any layer by the painting phase.
-        bool didDrawText = false;
-
-        // Approximate number of draw commands issued by the painting phase of
-        // beginFrame.
-        int drawCount = 0;
-    };
-
-    // Execute the BeginMainFrame processing steps, an approximation of what
-    // cc::ThreadProxy::BeginMainFrame would do.
-    BeginFrameResult beginFrame();
-
-private:
-    SimLayerTreeView* m_layerTreeView;
-    WebViewImpl* m_webViewImpl;
-    double m_lastFrameTimeMonotonic;
-};
-
-} // namespace blink
-
-#endif